Scharf
charging apparatus



DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published at therequest of the applicant or owner in accordance with the Notice of Dec.16. 1969, 869 0.0. 687. The abstracts of Defensive Publicationapplications are identified by distinctly numbered series and arearranged chronologically. The heading of each abstract indicates thenumber of pages of specification, including claims and sheets ofdrawings contained in the application as originally filed. The files ofthese applications are available to the public for inspection andreproduction may be purchased for 30 cents a sheet.

Defensive Publication applications have not been examined as to themerits of alleged invention. The Patent Ofllce makes no assertion as tothe novelty of the disclosed subject matter.

PUBLISHED JUNE 30, 1970 T875,026 CHARGING APPARATUS Philip ThompsonScharf, 901 Elmgrove Road, Pittsford, NY. 14650 Filed Oct. 30, 1969,Ser. No. 872,573

Int. Cl. G03g 13/00 US. Cl. 250--49.5 1 Sheet Drawing. 7 PagesSpecification An apparatus is provided for induction charging of areceiver having a photoconductive surface. Proper spacing between thephotoconductive surface of the receiver and the conductive surface of acharging roller is obtained in one embodiment by providing a photoresistinsulative dot pattern on the conductive surface of the roller. Airionization takes place in the spacing during application of a potentialbetween the conductive surface of the charging roller and a conductivebacking on the receiver. In another embodiment the proper spacing isprovided by an insulative powder which is sprinkled or dusted onto theconductive surface prior to use.

June 30, 1970 SCHARF T875,026

CHARGING APPARATUS Filed Oct. 30, 1969 PHILIP T. SCHARF INVENTOR.

BY @a 6,4910% ATTORNEYS

